Fernox Total Filter TF1 Spanner

This is a spanner to help remove the head from a Fernox Total Filter TF1 Central Heating filter.

These can sometimes get stuck and this spanner/wrench is a really good size to help give some additional leverage, especially if the filter is in an inaccessible space.

The newer filters already come with a spanner, but mine didn't. Also, if you had yours fitted by a plumber, they sometimes don't leave them behind.

Print at 0.2mm layer height in any good strong PLA, I used 35% infill and it prove easily up to the task

The TF1 filter head is 100mm diameter, with 3mm high raised grip points